ICSE ICSE Class 8 - CISCE Question Bank Solutions

What is a prism?

State the two laws of reflection of light.

Name the mirror which always forms an erect and virtual image. What is the size of the image as compared to that of the object?

Name the mirror which forms an erect, virtual and enlarged image of an object. What is the position of object relative to the mirror?

What is a real image? Name the mirror which can be used to obtain the real image of an object. What should be the position of the object relative to the mirror?

Say TRUE or FALSE

The image formed by the plane mirror is laterally inverted, hence the image seen through the periscope is also laterally inverted

Light travels in the same straight line path while passing through different media.

The angle formed between the normal and the refracted ray is known as the angle of incidence.

At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.

 Write true or false 

 At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.

The focal length of a convex mirror is equal to its radius of curvature.

 Write true or false

The focal length of a convex mirror is equal to its radius of curvature.

A .............. mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.

A ............ mirror always forms a virtual image.

A ray of light passing through centre of curvature of a spherical mirror, after reflection

The image formed by a convex mirror is

A convex mirror is used

The diagram given below in fig shows a ray of light AO falling on a surface separating two media. Draw the refracted ray in each, case.

State two uses of a convex mirror.

A driver uses a convex mirror as a rearview mirror. Explain the reason with the help of a ray diagram.